Word problem involving multiplication or division with mixed numbers

Question

A construction company needs to remove 2 1/6

 tons of dirt from a construction site. They can remove 7/8

 tons of dirt each hour. What is the total number of hours it will take to remove the dirt?

Answer 1

Do you remember the rule for dividing fractions: invert the denominator and multiply.

2 1/6 = 13/6 tons

(13/6) tons / (7/8) tons per hr = (13 * 8) /(7 * 3) = 52/21 = 2 10/21 hrs